A mounting apparatus includes a chassis, a bracket, and two resilient plates. The chassis includes two opposite sidewalls. A protrusion and a hook protrude from an inner surface of each sidewall. The bracket includes a fixing plate for mounting a number of fans, and two end plates. Each end plate defines a first slot, a second slot, a first notch communicating with a bottom of the first slot, and a second notch communicating with a bottom of the second slot. The resilient plates are mounted to inner surfaces of the end plates. Each resilient plate defines a hooking hole overlapping one of the second slots. The protrusions extend through the first notches and engage in the first slots. The hooks extend through the second notches and engage in the second slots and the hooking holes, to lock the bracket to the chassis.